History for IPR disclosure
Hifn's Statement on IPR Claimed in LZS and MPPC compression algorithms

From: http://www.ietf.org/ietf-ftp/IPR/hifn-ipr-multiple-rfcs.txt

Title: Hifn's Statement on IPR Claimed in LZS and MPPC compression algorithms
Date: 8 December 2004
From: Robert Friend

This note is to advise the IETF that the LZS and MPPC compression algorithms
are subject to patent and other intellectual property rights claims,
specifically U.S. patent numbers 4,701,745, 5,003,307, 5,016,009, 5,126,739,
5,146,221, 5,414,425, 5,414,850, 5,463,390, 5,506,580, 5,532,694.
Implementations of LZS and MPPC compression methods are referenced in certain
IETF documents, specifically RFC1967, RFC1974, RFC2118, RFC2395, RFC3078, and
RFC3943.

Software licenses for a reference implementation are available for
use in IPPCP, IPSec, PPP, in addition to TLS applications at no cost.

Software licenses are available on a non-discriminatory basis.
Hardware implementations are also available. For more information,
contact Hifn at the address listed with the author's address.

For more information, contact Hifn at the address listed below or at the RFC
author's address.

Hifn
750 University Ave.
Los Gatos, CA 95032